User guide

B-5 l Appendix
Calculating Blade Interruption
To calculate interruption time:
(0.937 in. + 0.250 in.)
X 60,000msec/rev = 3.2 msec
31.4 in. 718 rpm
Knowing the interruption time and the line speed, you can calculate the amount of
production deflection that must be accommodated during cutting. To calculate the
amount of extrudate deflection between the cutter and puller, multiply line speed
by interruption time:
Blade Interruption X Line speed, X 12
= Deflection,
time, msec fpm 60,000 in.
3.2 msec X 60 fpm X 0.0002 = 0.038 in.
In this example the puller and cutter must be set up to allow for 0.038" of product
deflection during cutting. Failure to do this can lead to puller stoppage (which can
form annular rings on the product), and poor-quality cuts (hairs or fuzz and angular
cuts.
Straight blade
Curved blade
1.187”
2.25”
(continued)